Source code

Revision control

Other Tools

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Markers are useful to delimit something important happening such as the first
// paint. Unlike labels, which are only recorded in the profile buffer if a
// sample is collected while the label is on the label stack, markers will
// always be recorded in the profile buffer.
//
// This header contains basic definitions necessary to create marker types, and
// to add markers to the profiler buffers.
//
// If basic marker types are needed, #include
// "mozilla/BaseProfilerMarkerTypes.h" instead.
//
// But if you want to create your own marker type locally, you can #include this
// header only; look at mozilla/BaseProfilerMarkerTypes.h for examples of how to
// define types, and mozilla/BaseProfilerMarkerPrerequisites.h for some
// supporting types.
//
// To then record markers:
// - Use `baseprofiler::AddMarker(...)` from mozglue or other libraries that
// are outside of xul, especially if they may happen outside of xpcom's
// lifetime (typically startup, shutdown, or tests).
// - Otherwise #include "ProfilerMarkers.h" instead, and use
// `profiler_add_marker(...)`.
// See these functions for more details.
#ifndef BaseProfilerMarkers_h
#define BaseProfilerMarkers_h
#include "mozilla/BaseProfilerMarkersDetail.h"
#include "mozilla/BaseProfilerLabels.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Unused.h"
#include <functional>
#include <string>
#include <utility>
namespace mozilla::baseprofiler {
#ifdef MOZ_GECKO_PROFILER
// Forward-declaration. TODO: Move to more common header, see bug 1681416.
MFBT_API bool profiler_capture_backtrace_into(
ProfileChunkedBuffer& aChunkedBuffer, StackCaptureOptions aCaptureOptions);
// Add a marker to a given buffer. `AddMarker()` and related macros should be
// used in most cases, see below for more information about them and the
// parameters; This function may be useful when markers need to be recorded in a
// local buffer outside of the main profiler buffer.
template <typename MarkerType, typename... PayloadArguments>
ProfileBufferBlockIndex AddMarkerToBuffer(
ProfileChunkedBuffer& aBuffer, const ProfilerString8View& aName,
const MarkerCategory& aCategory, MarkerOptions&& aOptions,
MarkerType aMarkerType, const PayloadArguments&... aPayloadArguments) {
Unused << aMarkerType; // Only the empty object type is useful.
AUTO_BASE_PROFILER_LABEL("baseprofiler::AddMarkerToBuffer", PROFILER);
return base_profiler_markers_detail::AddMarkerToBuffer<MarkerType>(
aBuffer, aName, aCategory, std::move(aOptions),
::mozilla::baseprofiler::profiler_capture_backtrace_into,
aPayloadArguments...);
}
// Add a marker (without payload) to a given buffer.
inline ProfileBufferBlockIndex AddMarkerToBuffer(
ProfileChunkedBuffer& aBuffer, const ProfilerString8View& aName,
const MarkerCategory& aCategory, MarkerOptions&& aOptions = {}) {
return AddMarkerToBuffer(aBuffer, aName, aCategory, std::move(aOptions),
markers::NoPayload{});
}
#endif // MOZ_GECKO_PROFILER
// Add a marker to the Base Profiler buffer.
// - aName: Main name of this marker.
// - aCategory: Category for this marker.
// - aOptions: Optional settings (such as timing, inner window id,
// backtrace...), see `MarkerOptions` for details.
// - aMarkerType: Empty object that specifies the type of marker.
// - aPayloadArguments: Arguments expected by this marker type's
// ` StreamJSONMarkerData` function.
template <typename MarkerType, typename... PayloadArguments>
ProfileBufferBlockIndex AddMarker(
const ProfilerString8View& aName, const MarkerCategory& aCategory,
MarkerOptions&& aOptions, MarkerType aMarkerType,
const PayloadArguments&... aPayloadArguments) {
#ifndef MOZ_GECKO_PROFILER
return {};
#else
if ((aOptions.ThreadId().IsUnspecified() ||
aOptions.ThreadId().ThreadId() == profiler_current_thread_id())
? !baseprofiler::profiler_thread_is_being_profiled()
// If targetting another thread, we can only check if the profiler
// is active&unpaused.
: !baseprofiler::detail::RacyFeatures::IsActiveAndUnpaused()) {
return {};
}
return ::mozilla::baseprofiler::AddMarkerToBuffer(
base_profiler_markers_detail::CachedBaseCoreBuffer(), aName, aCategory,
std::move(aOptions), aMarkerType, aPayloadArguments...);
#endif
}
// Add a marker (without payload) to the Base Profiler buffer.
inline ProfileBufferBlockIndex AddMarker(const ProfilerString8View& aName,
const MarkerCategory& aCategory,
MarkerOptions&& aOptions = {}) {
return AddMarker(aName, aCategory, std::move(aOptions), markers::NoPayload{});
}
} // namespace mozilla::baseprofiler
// Same as `AddMarker()` (without payload). This macro is safe to use even if
// MOZ_GECKO_PROFILER is not #defined.
#define BASE_PROFILER_MARKER_UNTYPED(markerName, categoryName, ...) \
do { \
AUTO_PROFILER_STATS(BASE_PROFILER_MARKER_UNTYPED); \
::mozilla::baseprofiler::AddMarker( \
markerName, ::mozilla::baseprofiler::category::categoryName, \
##__VA_ARGS__); \
} while (false)
// Same as `AddMarker()` (with payload). This macro is safe to use even if
// MOZ_GECKO_PROFILER is not #defined.
#define BASE_PROFILER_MARKER(markerName, categoryName, options, MarkerType, \
...) \
do { \
AUTO_PROFILER_STATS(BASE_PROFILER_MARKER_with_##MarkerType); \
::mozilla::baseprofiler::AddMarker( \
markerName, ::mozilla::baseprofiler::category::categoryName, options, \
::mozilla::baseprofiler::markers::MarkerType{}, ##__VA_ARGS__); \
} while (false)
namespace mozilla::baseprofiler::markers {
// Most common marker type. Others are in BaseProfilerMarkerTypes.h.
struct TextMarker {
static constexpr Span<const char> MarkerTypeName() {
return MakeStringSpan("Text");
}
static void StreamJSONMarkerData(baseprofiler::SpliceableJSONWriter& aWriter,
const ProfilerString8View& aText) {
aWriter.StringProperty("name", aText);
}
static MarkerSchema MarkerTypeDisplay() {
using MS = MarkerSchema;
MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable};
schema.SetChartLabel("{marker.data.name}");
schema.SetTableLabel("{marker.name} - {marker.data.name}");
schema.AddKeyLabelFormat("name", "Details", MS::Format::String);
return schema;
}
};
// Keep this struct in sync with the `gecko_profiler::marker::Tracing` Rust
// counterpart.
struct Tracing {
static constexpr Span<const char> MarkerTypeName() {
return MakeStringSpan("tracing");
}
static void StreamJSONMarkerData(SpliceableJSONWriter& aWriter,
const ProfilerString8View& aCategory) {
if (aCategory.Length() != 0) {
aWriter.StringProperty("category", aCategory);
}
}
static MarkerSchema MarkerTypeDisplay() {
using MS = MarkerSchema;
MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable,
MS::Location::TimelineOverview};
schema.AddKeyLabelFormat("category", "Type", MS::Format::String);
return schema;
}
};
} // namespace mozilla::baseprofiler::markers
// Add a text marker. This macro is safe to use even if MOZ_GECKO_PROFILER is
// not #defined.
#define BASE_PROFILER_MARKER_TEXT(markerName, categoryName, options, text) \
do { \
AUTO_PROFILER_STATS(BASE_PROFILER_MARKER_TEXT); \
::mozilla::baseprofiler::AddMarker( \
markerName, ::mozilla::baseprofiler::category::categoryName, options, \
::mozilla::baseprofiler::markers::TextMarker{}, text); \
} while (false)
namespace mozilla::baseprofiler {
// RAII object that adds a BASE_PROFILER_MARKER_TEXT when destroyed; the
// marker's timing will be the interval from construction (unless an instant or
// start time is already specified in the provided options) until destruction.
class MOZ_RAII AutoProfilerTextMarker {
public:
AutoProfilerTextMarker(const char* aMarkerName,
const MarkerCategory& aCategory,
MarkerOptions&& aOptions, const std::string& aText)
: mMarkerName(aMarkerName),
mCategory(aCategory),
mOptions(std::move(aOptions)),
mText(aText) {
MOZ_ASSERT(mOptions.Timing().EndTime().IsNull(),
"AutoProfilerTextMarker options shouldn't have an end time");
if (mOptions.Timing().StartTime().IsNull()) {
mOptions.Set(MarkerTiming::InstantNow());
}
}
~AutoProfilerTextMarker() {
mOptions.TimingRef().SetIntervalEnd();
AUTO_PROFILER_STATS(AUTO_BASE_PROFILER_MARKER_TEXT);
AddMarker(ProfilerString8View::WrapNullTerminatedString(mMarkerName),
mCategory, std::move(mOptions), markers::TextMarker{}, mText);
}
protected:
const char* mMarkerName;
MarkerCategory mCategory;
MarkerOptions mOptions;
std::string mText;
};
#ifdef MOZ_GECKO_PROFILER
extern template MFBT_API ProfileBufferBlockIndex
AddMarker(const ProfilerString8View&, const MarkerCategory&, MarkerOptions&&,
markers::TextMarker, const std::string&);
extern template MFBT_API ProfileBufferBlockIndex
AddMarkerToBuffer(ProfileChunkedBuffer&, const ProfilerString8View&,
const MarkerCategory&, MarkerOptions&&, markers::NoPayload);
extern template MFBT_API ProfileBufferBlockIndex AddMarkerToBuffer(
ProfileChunkedBuffer&, const ProfilerString8View&, const MarkerCategory&,
MarkerOptions&&, markers::TextMarker, const std::string&);
#endif // MOZ_GECKO_PROFILER
} // namespace mozilla::baseprofiler
// Creates an AutoProfilerTextMarker RAII object. This macro is safe to use
// even if MOZ_GECKO_PROFILER is not #defined.
#define AUTO_BASE_PROFILER_MARKER_TEXT(markerName, categoryName, options, \
text) \
::mozilla::baseprofiler::AutoProfilerTextMarker BASE_PROFILER_RAII( \
markerName, ::mozilla::baseprofiler::category::categoryName, options, \
text)
#endif // BaseProfilerMarkers_h